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# Two-dimensional motion is not always projectile motion In two-dimensional motion that is not projectile motion is not accelerating the object?

Updated: 4/28/2022

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14y ago

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Q: Two-dimensional motion is not always projectile motion In two-dimensional motion that is not projectile motion is not accelerating the object?
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### What is the acceleration of a projectile at the peak of its trajectory?

Assuming negligible air resistance, the acceleration of a projectile near the Earth's surface is always the gravitational 9.81 m/sec/sec downwards, regardless of where in the trajectory the projectile is.

### Is it true or false that a cannon ball rolling down a slope is considered a projectile?

Since I have read that the path of a projectile is always a parabola, I must say no. The parabolic shape of a projectile's path results from the combination of the force and direction with which it is launched and its weight.A ball rolling down a slope, is not Projectile Motion. While a cannon ball can be used to be a projectile, as far as Physics goes, that is not how it is operating at the moment (rolling down a slope).

yes

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### A graph showing zero slope for the velocity vs time always indicates that the object is not moving?

No. It always indicates that the object is not accelerating.

### A graph showing zero slope for the velocity vs. time always indicates that the object is not moving?

No. It always indicates that the object is not accelerating.

### What is the formula projectile?

D= vyt+1/2at2 a = (v2-v1)/t These are the two most basic formula that are used to figure out projectile motion questions, combine with SOHCAHTOA (trig) to solve simple projectile motion problems. Remember the horizontal velocity is always constant.